1#!/bin/sh
2# Copyright (c) 2007, Nanako Shiraishi
3dashless=$(basename "$0" | sed -e 's/-/ /')
5USAGE="list [<options>]
6 or: $dashless show [<stash>]
7 or: $dashless drop [-q|--quiet] [<stash>]
8 or: $dashless ( pop | apply ) [--index] [-q|--quiet] [<stash>]
9 or: $dashless branch <branchname> [<stash>]
10 or: $dashless [save [--patch] [-k|--[no-]keep-index] [-q|--quiet] [<message>]]
11 or: $dashless clear"
12SUBDIRECTORY_OK=Yes
14OPTIONS_SPEC=
15. git-sh-setup
16require_work_tree
17cd_to_toplevel
18TMP="$GIT_DIR/.git-stash.$$"
20trap 'rm -f "$TMP-*"' 0
21ref_stash=refs/stash
23if git config --get-colorbool color.interactive; then
25 help_color="$(git config --get-color color.interactive.help 'red bold')"
26 reset_color="$(git config --get-color '' reset)"
27else
28 help_color=
29 reset_color=
30fi
31no_changes () {
33 git diff-index --quiet --cached HEAD --ignore-submodules -- &&
34 git diff-files --quiet --ignore-submodules
35}
36clear_stash () {
38 if test $# != 0
39 then
40 die "git stash clear with parameters is unimplemented"
41 fi
42 if current=$(git rev-parse --verify $ref_stash 2>/dev/null)
43 then
44 git update-ref -d $ref_stash $current
45 fi
46}
47create_stash () {
49 stash_msg="$1"
50 git update-index -q --refresh
52 if no_changes
53 then
54 exit 0
55 fi
56 # state of the base commit
58 if b_commit=$(git rev-parse --verify HEAD)
59 then
60 head=$(git rev-list --oneline -n 1 HEAD --)
61 else
62 die "You do not have the initial commit yet"
63 fi
64 if branch=$(git symbolic-ref -q HEAD)
66 then
67 branch=${branch#refs/heads/}
68 else
69 branch='(no branch)'
70 fi
71 msg=$(printf '%s: %s' "$branch" "$head")
72 # state of the index
74 i_tree=$(git write-tree) &&
75 i_commit=$(printf 'index on %s\n' "$msg" |
76 git commit-tree $i_tree -p $b_commit) ||
77 die "Cannot save the current index state"
78 if test -z "$patch_mode"
80 then
81 # state of the working tree
83 w_tree=$( (
84 rm -f "$TMP-index" &&
85 cp -p ${GIT_INDEX_FILE-"$GIT_DIR/index"} "$TMP-index" &&
86 GIT_INDEX_FILE="$TMP-index" &&
87 export GIT_INDEX_FILE &&
88 git read-tree -m $i_tree &&
89 git diff --name-only -z HEAD | git update-index -z --add --remove --stdin &&
90 git write-tree &&
91 rm -f "$TMP-index"
92 ) ) ||
93 die "Cannot save the current worktree state"
94 else
96 rm -f "$TMP-index" &&
98 GIT_INDEX_FILE="$TMP-index" git read-tree HEAD &&
99 # find out what the user wants
101 GIT_INDEX_FILE="$TMP-index" \
102 git add--interactive --patch=stash -- &&
103 # state of the working tree
105 w_tree=$(GIT_INDEX_FILE="$TMP-index" git write-tree) ||
106 die "Cannot save the current worktree state"
107 git diff-tree -p HEAD $w_tree > "$TMP-patch" &&
109 test -s "$TMP-patch" ||
110 die "No changes selected"
111 rm -f "$TMP-index" ||
113 die "Cannot remove temporary index (can't happen)"
114 fi
116 # create the stash
118 if test -z "$stash_msg"
119 then
120 stash_msg=$(printf 'WIP on %s' "$msg")
121 else
122 stash_msg=$(printf 'On %s: %s' "$branch" "$stash_msg")
123 fi
124 w_commit=$(printf '%s\n' "$stash_msg" |
125 git commit-tree $w_tree -p $b_commit -p $i_commit) ||
126 die "Cannot record working tree state"
127}
128save_stash () {
130 keep_index=
131 patch_mode=
132 while test $# != 0
133 do
134 case "$1" in
135 -k|--keep-index)
136 keep_index=t
137 ;;
138 --no-keep-index)
139 keep_index=
140 ;;
141 -p|--patch)
142 patch_mode=t
143 keep_index=t
144 ;;
145 -q|--quiet)
146 GIT_QUIET=t
147 ;;
148 --)
149 shift
150 break
151 ;;
152 -*)
153 echo "error: unknown option for 'stash save': $1"
154 echo " To provide a message, use git stash save -- '$1'"
155 usage
156 ;;
157 *)
158 break
159 ;;
160 esac
161 shift
162 done
163 stash_msg="$*"
165 git update-index -q --refresh
167 if no_changes
168 then
169 say 'No local changes to save'
170 exit 0
171 fi
172 test -f "$GIT_DIR/logs/$ref_stash" ||
173 clear_stash || die "Cannot initialize stash"
174 create_stash "$stash_msg"
176 # Make sure the reflog for stash is kept.
178 : >>"$GIT_DIR/logs/$ref_stash"
179 git update-ref -m "$stash_msg" $ref_stash $w_commit ||
181 die "Cannot save the current status"
182 say Saved working directory and index state "$stash_msg"
183 if test -z "$patch_mode"
185 then
186 git reset --hard ${GIT_QUIET:+-q}
187 if test -n "$keep_index" && test -n $i_tree
189 then
190 git read-tree --reset -u $i_tree
191 fi
192 else
193 git apply -R < "$TMP-patch" ||
194 die "Cannot remove worktree changes"
195 if test -z "$keep_index"
197 then
198 git reset
199 fi
200 fi
201}
202have_stash () {
204 git rev-parse --verify $ref_stash >/dev/null 2>&1
205}
206list_stash () {
208 have_stash || return 0
209 git log --format="%gd: %gs" -g "$@" $ref_stash --
210}
211show_stash () {
213 have_stash || die 'No stash found'
214 flags=$(git rev-parse --no-revs --flags "$@")
216 if test -z "$flags"
217 then
218 flags=--stat
219 fi
220 w_commit=$(git rev-parse --quiet --verify --default $ref_stash "$@") &&
222 b_commit=$(git rev-parse --quiet --verify "$w_commit^") ||
223 die "'$*' is not a stash"
224 git diff $flags $b_commit $w_commit
226}
227apply_stash () {
229 applied_stash=
230 unstash_index=
231 while test $# != 0
233 do
234 case "$1" in
235 --index)
236 unstash_index=t
237 ;;
238 -q|--quiet)
239 GIT_QUIET=t
240 ;;
241 *)
242 break
243 ;;
244 esac
245 shift
246 done
247 if test $# = 0
249 then
250 have_stash || die 'Nothing to apply'
251 applied_stash="$ref_stash@{0}"
252 else
253 applied_stash="$*"
254 fi
255 # stash records the work tree, and is a merge between the
257 # base commit (first parent) and the index tree (second parent).
258 s=$(git rev-parse --quiet --verify --default $ref_stash "$@") &&
259 w_tree=$(git rev-parse --quiet --verify "$s:") &&
260 b_tree=$(git rev-parse --quiet --verify "$s^1:") &&
261 i_tree=$(git rev-parse --quiet --verify "$s^2:") ||
262 die "$*: no valid stashed state found"
263 git update-index -q --refresh &&
265 git diff-files --quiet --ignore-submodules ||
266 die 'Cannot apply to a dirty working tree, please stage your changes'
267 # current index state
269 c_tree=$(git write-tree) ||
270 die 'Cannot apply a stash in the middle of a merge'
271 unstashed_index_tree=
273 if test -n "$unstash_index" && test "$b_tree" != "$i_tree" &&
274 test "$c_tree" != "$i_tree"
275 then
276 git diff-tree --binary $s^2^..$s^2 | git apply --cached
277 test $? -ne 0 &&
278 die 'Conflicts in index. Try without --index.'
279 unstashed_index_tree=$(git write-tree) ||
280 die 'Could not save index tree'
281 git reset
282 fi
283 eval "
285 GITHEAD_$w_tree='Stashed changes' &&
286 GITHEAD_$c_tree='Updated upstream' &&
287 GITHEAD_$b_tree='Version stash was based on' &&
288 export GITHEAD_$w_tree GITHEAD_$c_tree GITHEAD_$b_tree
289 "
290 if test -n "$GIT_QUIET"
292 then
293 export GIT_MERGE_VERBOSITY=0
294 fi
295 if git merge-recursive $b_tree -- $c_tree $w_tree
296 then
297 # No conflict
298 if test -n "$unstashed_index_tree"
299 then
300 git read-tree "$unstashed_index_tree"
301 else
302 a="$TMP-added" &&
303 git diff-index --cached --name-only --diff-filter=A $c_tree >"$a" &&
304 git read-tree --reset $c_tree &&
305 git update-index --add --stdin <"$a" ||
306 die "Cannot unstage modified files"
307 rm -f "$a"
308 fi
309 squelch=
310 if test -n "$GIT_QUIET"
311 then
312 squelch='>/dev/null 2>&1'
313 fi
314 eval "git status $squelch" || :
315 else
316 # Merge conflict; keep the exit status from merge-recursive
317 status=$?
318 if test -n "$unstash_index"
319 then
320 echo >&2 'Index was not unstashed.'
321 fi
322 exit $status
323 fi
324}
325drop_stash () {
327 have_stash || die 'No stash entries to drop'
328 while test $# != 0
330 do
331 case "$1" in
332 -q|--quiet)
333 GIT_QUIET=t
334 ;;
335 *)
336 break
337 ;;
338 esac
339 shift
340 done
341 if test $# = 0
343 then
344 set x "$ref_stash@{0}"
345 shift
346 fi
347 # Verify supplied argument looks like a stash entry
348 s=$(git rev-parse --verify "$@") &&
349 git rev-parse --verify "$s:" > /dev/null 2>&1 &&
350 git rev-parse --verify "$s^1:" > /dev/null 2>&1 &&
351 git rev-parse --verify "$s^2:" > /dev/null 2>&1 ||
352 die "$*: not a valid stashed state"
353 git reflog delete --updateref --rewrite "$@" &&
355 say "Dropped $* ($s)" || die "$*: Could not drop stash entry"
356 # clear_stash if we just dropped the last stash entry
358 git rev-parse --verify "$ref_stash@{0}" > /dev/null 2>&1 || clear_stash
359}
360apply_to_branch () {
362 have_stash || die 'Nothing to apply'
363 test -n "$1" || die 'No branch name specified'
365 branch=$1
366 if test -z "$2"
368 then
369 set x "$ref_stash@{0}"
370 fi
371 stash=$2
372 git checkout -b $branch $stash^ &&
374 apply_stash --index $stash &&
375 drop_stash $stash
376}
377# The default command is "save" if nothing but options are given
379seen_non_option=
380for opt
381do
382 case "$opt" in
383 -*) ;;
384 *) seen_non_option=t; break ;;
385 esac
386done
387test -n "$seen_non_option" || set "save" "$@"
389# Main command set
391case "$1" in
392list)
393 shift
394 list_stash "$@"
395 ;;
396show)
397 shift
398 show_stash "$@"
399 ;;
400save)
401 shift
402 save_stash "$@"
403 ;;
404apply)
405 shift
406 apply_stash "$@"
407 ;;
408clear)
409 shift
410 clear_stash "$@"
411 ;;
412create)
413 if test $# -gt 0 && test "$1" = create
414 then
415 shift
416 fi
417 create_stash "$*" && echo "$w_commit"
418 ;;
419drop)
420 shift
421 drop_stash "$@"
422 ;;
423pop)
424 shift
425 if apply_stash "$@"
426 then
427 drop_stash "$applied_stash"
428 fi
429 ;;
430branch)
431 shift
432 apply_to_branch "$@"
433 ;;
434*)
435 case $# in
436 0)
437 save_stash &&
438 say '(To restore them type "git stash apply")'
439 ;;
440 *)
441 usage
442 esac
443 ;;
444esac